Notes If you don’t see Optional add-ons on the Subscription details page:

You may not have purchased any add-ons yet To purchase the SharePoint Online Storage or SharePoint Online Storage for Small Business add-on, beside the number of user licenses, click Add more or Change quantity. You will then be able to complete the rest of these steps.

You may be using a trial subscription Storage space add-ons are not available for trial subscriptions.

Your subscription may not be eligible for storage add-ons Check the eligibility list.

In the Add licenses wizard, under Optional add-ons, enter the amount of storage you want to add in the box. The amount of overall available storage for your subscription will be increased by the amount you enter.